摘要:
In a shift-by-wire gearshift control apparatus, even if a switching anomaly in which switching between forward and reverse gears is not possible has occurred, transmission of driving power to the output shaft 10 can be interrupted as quickly as possible. In the case of the occurrence of a switching anomaly in which switching from a forward gear stage to a reverse gear stage, or vice versa, is not possible, as a path for draining engaging hydraulic pressure supplied to a frictional engagement element (C1 to C4, B1, B2) involved in establishing the current gear stage, the hydraulic control circuit 4 secures an anomaly drain path (91 or 92) that is shorter than a normal drain path (81, 82 or 83) secured by the hydraulic control circuit 4 during normal switching.
摘要:
A vehicle shift control device includes: a parking lock device selectively switched by driving of an electric motor between a lock position restraining rotation of wheels and a non-lock position not restraining the rotation of the wheels; and an electronic control device controlling the electric motor, the vehicle shift control device providing a parking lock switching control of selectively switching the parking lock device between the lock position and the non-locking position in an activated state of the electronic control device, wherein if the electronic control device is switched from the deactivated state to the activated state, the vehicle shift control device provides a wall abutment control of driving the parking lock device with the electric motor to a mechanical displacement end before starting the provision of the parking lock switching control, and if a temperature of the electric motor is lower than a predefined low-temperature determination value, the vehicle shift control device provides an electric motor heat generation control of energizing the electric motor without rotating the electric motor after the electronic control device is switched from a deactivated state to an activated state and before starting the provision of the wall abutment control.
摘要:
In a shift-by-wire gearshift control apparatus, even if a switching anomaly in which switching between forward and reverse gears is not possible has occurred, transmission of driving power to the output shaft 10 can be interrupted as quickly as possible. In the case of the occurrence of a switching anomaly in which switching from a forward gear stage to a reverse gear stage, or vice versa, is not possible, as a path for draining engaging hydraulic pressure supplied to a frictional engagement element (C1 to C4, B1, B2) involved in establishing the current gear stage, the hydraulic control circuit 4 secures an anomaly drain path (91 or 92) that is shorter than a normal drain path (81, 82 or 83) secured by the hydraulic control circuit 4 during normal switching.
摘要:
A vehicle shift control device includes: a parking lock device selectively switched by driving of an electric motor between a lock position restraining rotation of wheels and a non-lock position not restraining the rotation of the wheels; and an electronic control device controlling the electric motor, the vehicle shift control device providing a parking lock switching control of selectively switching the parking lock device between the lock position and the non-locking position in an activated state of the electronic control device, wherein if the electronic control device is switched from the deactivated state to the activated state, the vehicle shift control device provides a wall abutment control of driving the parking lock device with the electric motor to a mechanical displacement end before starting the provision of the parking lock switching control, and if a temperature of the electric motor is lower than a predefined low-temperature determination value, the vehicle shift control device provides an electric motor heat generation control of energizing the electric motor without rotating the electric motor after the electronic control device is switched from a deactivated state to an activated state and before starting the provision of the wall abutment control.
摘要:
A control device of a power transmission device includes a damper absorbing torsional vibration between a fluid transmission device with a lockup clutch and an engine, the power transmission device is disposed with a connecting/disconnecting device capable of connecting and interrupting power transmission on the downstream side of the fluid transmission device, the control device has a lockup engagement control means engaging the lockup clutch while the power transmission is interrupted by the connecting/disconnecting device in a predetermined engine rotation speed range lower than an idle rotation speed when the engine is started, the lockup engagement control means includes: a resonance due to frequency entrainment determination means determining whether a resonance due to frequency entrainment occurs that blocks an increase in an engine rotation speed NE depending on whether a predefined resonance determination time is exceeded by a required start time of the engine or an elapsed time until the engine rotation speed NE reaches a predetermined rotation speed; a lockup engagement means engaging the lockup clutch while the power transmission is interrupted by the connecting/disconnecting device when the resonance due to frequency entrainment determination means determines that the resonance due to frequency entrainment occurs.
摘要:
A vehicular fluid power transmitting device includes a pump impeller, a turbine runner, a damper device, and a ring-shaped annular set member. The pump shell has a rear shell and a front shell that is connected to the rear shell. Also, the ring-shaped annular set member connects the damper output member to the front shell and is fixed to the front shell. An intermediate position between a position of an outer radius of the front shell and a position of a radius of the cylindrical shaft is included in a width (W) of the annular set member in a radial direction of the annular set member.
摘要:
An operating device (40) for a state-changing element that is an embodiment of the present invention includes a detent mechanism (50) for displacing and positioning displacement members (22, 33) included in a state-changing element (10), an actuator (60) for driving the detent mechanism (50), and a control unit (5) that controls the actuator (60). The control unit (5) includes an initial motion means (S1) that, in a case of receiving a request to change the state of the state-changing element (10) and changing the position of a detent member (51), drives an electric motor (61) and reduces play in the rotation direction that exists in the actuator (60), and a management means (S2 to S5) that, when it has been determined that the play has been reduced, sets a value obtained by tacking on play in the rotation direction that exists in a coupling portion between a spindle (52) and an output shaft (63) to a rotation angle necessary for a position change of the detent member (51) corresponding to the request, as a target rotation angle of the electric motor (61).
摘要:
Providing a control apparatus for a vehicle having a parking lock device 50 which is placed in its released state with a hydraulic pressure generated by an oil pump 58 operated by an engine 26, which control apparatus permits reduction of a risk of unintended releasing of the parking lock device 50 upon occurrence of an operating failure of an ON-OFF switching valve 72 or a switching valve 70 of a hydraulic device 69 provided to supply the hydraulic pressure.Engine start restricting means 92 is configured to restrict starting of the engine 26 when a component of the hydraulic device 69 provided to operate the parking lock device 50 has an operating failure that causes the parking lock device 50 to be held in its released state, as compared with the starting when the component does not have the operating failure, so that the engine start restricting means 92 reduces a risk of releasing of the parking lock device 50 due to application of the hydraulic pressure from the hydraulic device 69 to the parking lock device 50, which application would be caused by the starting of the engine 26.
摘要:
A hydraulic control device for a multi-speed automatic transmission includes friction engagement elements, several hydraulic servos that engage and release the friction engagement elements, solenoid valves for engagement control, and a sorting switch valve that allocates engagement pressure from at least one of the solenoid valves for engagement control to two of the hydraulic servos. The sorting switch is switched between a first position that supplies engagement pressure to one of the two hydraulic servos in at least a Reverse, non-drive range and a specific Forward gear range, and a second position that supplies engagement pressure to the two hydraulic servos in other than the Forward range. The hydraulic control device supplies the engagement pressure to the two hydraulic servos when an all-solenoids-off failure occurs and the sorting switch is in the second position, and cuts off a source pressure to all solenoid valves when an all-solenoids-off failure occurs while the sorting switch valve is in the first position.
摘要:
Herein disclosed is a range determination apparatus of a vehicle which can prevent a shift range from being undefined in the speed change states of an automatic transmission with no manual valve. The range determination apparatus comprises a gear speed change mechanism having a plurality of planetary gears each transmitting an output torque of a drive source, and a plurality of friction engagement elements operative to have respective operation states changed between an engagement state and a disengagement state, and used for an automatic transmission realizing speed changes with a torque transmission path of the gear speed change mechanism changed by the operation states of the friction engagement elements, and a real shift range determination being carried out on the basis of the operation states of the friction engagement elements, wherein a T-ECU is operative to determine a current shift range based on the detection results obtained by oil pressure sensors and the operation patterns preliminarily memorized when the operation states of the friction engagement elements are not being changed.